Iphone 4 won't update to IOS 6.1.3 (JailBroken)?

I'm trying to update my Iphone 4 it is jailbroken and i want to update it, to get rid of the jail break and maybe free up a little space. But when i go into itunes and try and update it it will go maybe half way and stop then an error pops up. This happens every time i do it i have tried everything! DFU mode restoring etc. Does anyone know why or what this problem is?

Hmm… This happened to my ipod weeks ago! Try updating itunes or uninstalling it (what I did was reset my whole computer then installed Itunes… You could do that too)

Backup all the info on your iPhone to iTunes. Restore it so it is no longer jailbroken. Update the iphone to 6.1.3 then sync all of your stuff back. Then re-jailbreak it on the 6.1.3 firmware. This is why you should be carefull when you jailbreak your iDevices!

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